WTF! LARRY KING'S 7TH WIFE FILES FOR DIVORCE AFTER CLAIMING HE SLEPT WITH HER KID SISTER!

LOS ANGELES - Oh Larry!
CNN's Larry King is splitting from his seventh wife, a willowy blond who reportedly believes the 76-year-old cheated on her - with her kid sister.

The talk show anchor and his wife Shawn Southwick, 50, both filed for divorce Wednesday citing "irreconcilable differences."

The marriage crumbled after Southwick accused King of having an affair with her younger sister, Shannon Engemann, TMZ reported.

The National Enquirer first reported the creepy inter-family cheating allegation in December, quoting an unnamed friend of Southwick's.

The tabloid also said Southwick had an affair with her son's baseball coach in 2008 - a claim she denied.

"This is so ludicrous," Engemann told TMZ Wednesday. "She's singling me out, but Larry has been nothing but generous to our entire family, including me."

She admitted King gave her gifts but wasn't specific. She said Southwick threatened her over the phone, saying "If you dare sue the Enquirer I will pull out every last receipt that proves you had an affair with Larry."

She said King was "like a father" to her.

"I'm tired of taking the wrap for things. I did not have an affair with Larry," she said.

In his filing, King asks for joint custody of the couple's two sons, Chance, 11, and Cannon, 9.

"Larry's major concern is the welfare of his children. Beyond that, he'll have no further comment," King's spokesman Howard Rubenstein told the Daily News.

In her dueling paperwork, Southwick asks for primary physical custody of the boys, spousal and child support and the couple's Beverly Hills mansion.

A singer and TV personality, Southwick bragged on the couple's 10-year anniversary in 2007 that she was the only one of King's seven wives "to have lasted into the two digits."

The 5-foot-10 beauty made headlines when she entered rehab in 2008 for an alleged addiction to prescription painkillers.

At the time, Rubenstein denied speculation that she was depressed or anorexic.

"He's deeply concerned about her well-being," Rubenstein said of King.

"She has taken medications because of her migraine headaches that she's had since she was a young girl. She developed a dependency on painkillers as a result of being prescribed medication for the migraines."

Brooklyn-born King has been married eight times to seven women. He married his third wife twice.